Biology: Unit 3
Which statement(s) corresponds to cellular respiration?
-CO 2 diffuses passively out of the cell -O 2 diffuses passively when converted to CO 2
Why will external fluid flow into a plant cell?
-because the external salt concentration is less -because the external water concentration is greater
List the four organ systems which are operational in a amoeba.
-digestion -excretion -reproduction -respiration
TRUE/FALSE: Ribosomal RNA is produced in the cytoplasm.
FALSE
Simple cell division of plants and animals is an _______________ process.
a completely different
The simplest operational cell is still more complex than ________________.
a computer
The plasma membrane of a human cell:
acts as a selective gatekeeper
Some leukocytes absorb entire _________________ by the process of phagocytosis.
bacteria
Current scientific methods _________________ conclusively distinguish between all microorganisms
can NOT
each cell possesses a life of its own
cell theory
outer covering around plant cell made of fibrous material
cell wall
According to the Cell Theory, the _____________ is the basic unit of life; according to the Organismal Theory the __________________ is the basic unit.
cell; organism
all cellular material outside the nucleus
cytoplasm
The natural tendency of molecules to move from higher to lower concentrations is: _______________
diffusion
an outer covering of cells
epidermis
A leukocyte is responsible for:
fighting disease by phagocytosis or antibody production
What characteristic is completely unique about DNA?
it contains coded information
The relative concentration of water in a hypertonic solution is:
low
The Krebs cycle takes place within the :
mitochondria
The taxonomic classification of all organisms is ______________.
not certain
small structure(s) within nucleus
nucleolus
control center of the cell
nucleus
Any functional plant or animal with interrelated parts is considered as a(n) _____________.
organism
functional plant or animal
organism
a functioning organism represents life
organismal theory
hypertonic: _______________ the cell
out of
controls what comes into and goes out of the cell
plasma membrane
Which statements describe organisms referred to as "colonial"?
similar bacteria or protozoa which group together
large storage structures
vacuole
